Lamp.



PATENTED JUNE 23, 1903p G. JOHNSON.

V LAMP. APPLI OATION FILED MAR. 2, 1903.

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No. 731,909. PATBNTED JUNE 23, 1903.-

' G. JOHNSON.

LAMP.

APPLICATION FILED MAR. 2, 190a.

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-UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

LAMP.

SPECIFICATION fo'lmiilg' part of Letters Patent No. 731,909, dated June 23, 1903.

Original application filed September 10,

To all whom tt may concern.-

Be it known that I, CHARLES JOHNSON, a

citizen of the United States, residing at Butte,

in the county of Silver-bow and State of Mon-. tana, have invented new and useful Improvements in Lamps, of which the following is a specification.

for bandsmen, miners, campaign marchingclubs,bicycles, and for other illuminating purposes.

The invention aims-particularly to construct a lamp which is adapted for use for bandsmen and campaign marching-clubs, the lamp being such that it can be readily attached to the head-covering 0f the rnem hers of the hand or the club,

The invention further aims to construct a lamp which. shall be simple in its construction, generating i s own gas for illuminating purposes, strong, durable, efficient in its operation,and comparatively inexpensive to set up.

To this end the invention consists of the novel combination and arrangement of parts hereinafter more specifically described,'and illustrated in the accompanying drawings, and particularly pointed out in the claims hereunto appended.

In describing the invention in detail reference is hadto the accompanying drawings, forming a part of this specification, wherein like numerals of reference indicate corresponding parts throughout theseveral views, and in which Figure 1 is a sectional elevation of my improved lamp. Fig. 2 is a front elevation thereof. Fig. 3 is a front elevation of the burner, and Fig.4 is a front elevation of a modified form of burner.

Referring to the drawings by reference characters, 1 1 denotes a casiugwhich forms the watenres'ervoir of the lamp, the water be 1 ing indicated by the reference-numeral 14 The .casingl l may be constructed of any suitable shape and has connected to its bot-- tom a claw 14", the purpose of which is for attaching the lamp to a suitable supporting device adapted to be carried by the headwith a collar 20.

1902 Serial No. 122,886; Divided and this application filed March 2, 1903. Serial ITO-145,745. (No model.)

coveringof a member of a band or-marching= club. The form of supporting device for such purpose is shown in my application for Letters Patent, Serial No. 122,886, filed. September 10, 1902, of which this application is a division. In lieu of connecting thelamp to a supporting device carried by a headcovering the lamp may be connected to any other object desired. The casing 14 has connected to one side thereof in any suitable manner a receptacle 15, preferably cylindrical in contour and which forms the carbid holding chamber and gas generating chamber 15. Thecarhid is indicated by the reference character 15. It may be well to state that the lamp is what may be termed an acetylenegas lamp, and calcium-carbidis employed in connection with-the water in the casing 1 1 to generate the gas. The receptacle is connected to the casing 14 in such a manner that it will form one wall of the casing 14. The receptacle 15 is open at its top and is closed by means of a movable cap or cover 16. The latter is provided with an internallyscrew-threaded rim 16, which is adapted to engage external screw-threads formed on the receptacle 15, near the top thereof. The gasgenerating chamber 15 of the receptacle 15 communicates with the water-reservoir by means of providing the bottom 17 of the receptacle 15 with a port or passage 18, communicating with the port 18, formed in the taporing plug 18*, the port 18 communicating at its inner end with a vertically-extending passage 18, formed in the plug 18. The latter at its lower end is provided with the thumb-piece 18 to permit of adjusting it, and its upper end has connected thereto a hollow nipple 18", the latter provided with a series of perforations 18 A portion of the inner face of the nipple 18 is screw-threaded, and

these screw-threads engage with a series of screw-threads formed on the periphery of the plug 18, near the top thereof. The passage 18, formed in the plug 18 is adapted to open into the nipple 18 ranged opening and below the opening with an integral collar 19 and above the opening The collars 19 and 20 reg ister with the opening formed in the bottom The bottom 17 of the revceptacle 15 is formed with a centrally-ar- 17 of the receptacle l5 and are adapted to receive the plug 18 the collars being of the same contour as the plug 18". The nipple 18 rests upon the top edge of the collar 20. It may be well to state that the collars 19 and 20, in connection with the opening formed in the bottom 17, form a tapering socket to receive the plug 18". The plug 18 is adapted to regulate the flow of water from the waterreservoir 14 to the gas-generating or carbid chamber Arranged within the gas-gencrating or car'bid chamber 15 is a plate 21, preferably circular in contour and provided with a series of openings 22. The plate is further provided with an upwardly-extending flange or ledge 23. The plate 21 is mounted upon the mass of carbid 15 and held upon the carhid by means of a tapering coiled spring 24, which bears at its lower end against the plate 21, is retained upon the plate by the flange or ledge 23, and at its upper end bears against the inner face of the cover 16. The receptacle 15, near its top, is provided with an outlet-port 25 for the escape of gas from the gas-generating and carbid chamber 15 The latter is also provided with a safetyvalve mechanism and which consists of a valve 25, carrying on its lower face a packing-strip-27 and which normally engages its seat formed by the. boss 28, carried by the cover 16. The boss 28 is formed with a series of outlet-openings 29 and a centrally-arranged opening, through which extends the depending valve-stem 30, formed integral with the lower face of the valve 26 and extending within the gas-generating and carbid chamber 15. The lower end of the valve-stem 30 carries a pin 31, upon which is seated the stops 32 for the lower end of the tension-spring 33. The tension-spring 33 bears at its lower end against the stops 32 and at its upper end against the inner face of the boss 28. It will be evident that the valve 26 is retained against its seat through the action of the spring 33; but when the pressure ofgas overcomes the tension of the spring 33 the valve 26 will be lifted from its seat, so that the gas can escape through the ports 29.

The casing or water-reservoir 14 is provided with an inlet check-valve mechanism, Fig. 2, and which is arranged at the top of said cas ing 14. This mechanism is constructed of a sleeve 34, which extends through an opening 35 in the top of the casing 14 and projects above and below the top of the said casing cured thereto a yoke 38, forming a guide and support for the lowerend of avalve-stem 39, the latter carrying on its upper end the valvehead 40 and below the valve-head a coiled spring 41, the latter bearing at its upper end against the lower face of the valve-head 40 and at its lower end against the yoke 38. The function of the spring 41 is to normally retain the valve-head 40 against its seat formed by the shoulder 42 and the lower edge of the screw-threaded sleeve 43, which is secured to the inner face of the sleeve 34. It may be well to state that the sleeve 34 has its inner.

face formed of two different diameters, in the smaller of which is mounted the sleeve 43 and in the larger of which is mounted the valve 40, the latter being of smaller diameter than that portion of the sleeve 34 of larger diameter. When the reservoir or casing 14 is adapted to be charged with water, the entire inlet-valve mechanism is removed to enable the charging of the reservoir, and after a sufficient quantity of .water has been supplied thereto the inlet-valve mechanism is placed in its position. The amount of water supplied to the reservoir is such that it will not completely fill the same, leaving the airspace 14. After the inlet-valve mechanism has been placed in its position a sufficient quantity of air is then forced into the reservoir by means of a suitable hand-pump or other device, and when the required amount of air has been supplied the valve 40 will be brought against its seat, so as to close the opening to the water-reservoir or casing 14. It will be evident that when the reservoir is about to be charged with air the incoming air will overcome the tension of the spring 41, so the valve 40 will be removed from its seat and not interrupt the supply of air to the reservoir, but that when sufficient pressure of air has been supplied to the reservoir and the operation of supplying the air is discontinued the action of the spring 41 will cause the valve 40 to return to its seat, thereby closing the casing or water-reservoir.

Suitably secured to the top of the casing 14 is a coupling for connecting the burner and its housing to the casing 14 and also for establishing communication between the burner of the lamp and the gas-generating chamber for the purpose of supplying the burner with gas. The coupling consists of an L-shaped member provided with a longitudinally-extending passage 44 and a vertically-extending opening 45. The passage 44 communicates at one end with the port 25 and at its other end opens into the opening 45. The wall of the opening 45 is screw-threaded, as at 45. Extending within the opening 45 and connected to the screw threaded wall 45 thereof is a connecting member 46, provided with a pair of vertically-extending passages 47. (Only one is shown.) The connecting member 46 is formed with a shoulder 48 and rests upon the edge of the vertically-extend ing portion of the L-shaped member. The

connecting member 46 is eXteriorly screwthreaded and engages the screw-threaded wall of the opening45 and extends within the opening 45, but not entirely therethroughapproximately half or slightly past half of the length of the opening 45. The connecting member is attached to the bottom of a. housing for the burner by means of a series of rivets 49. The upper face of the connectin-g member 46 conforms to the contour of the bottom of the housing for the burnerg Mounted in the top of each of the passages '47 is a gas-supply and supporting pipe for the gas -burner 51. tially concentric in contour with a portion of each end, as at 52, extending at an inclination toward each other. Each end of the gasburner is provided with a jet-opening 53.

ing the burner is'concentric.

The burner 51 is constructed of a substantially concentric tube or pipe provided in its that the ends of the tube forming the burner as shown, consists of a shell 55, preferably openings 56.

manner as shown in Fig. 3.

extend toward each other at an inclination is for the purpose of directing the flame in' a The gas-supp1y and supporting pipes 50 are connected to the mental in contour, withthe exception that at their lower ends they are bent downwardly,

so as to engage in the passages 47, and at their upper ends bent forwardly, so as to engage with and support the burner.

The

pipes 50 are adapted to support the burner 52 within a suitable housing, which,

constructed of metal, the shell being secured 'to the enlarged portion of the connecting member 46 by means of the rivets or screws 49 and has its side provided with the air- The top of the shell is provided with an opening which communicates with a dome or chimney. The latter is formed with sidewalls 57,

top wall 58, and front and rear walls 59 60, respectively. The side walls 57 are provided with openings 61 and are constructed of material similar'to that employed in the shell 55. The front wall 59 is constructed of suitable transparent material and isornamented in any suitable manner, as

shown by theflag 62. The rear wall 60 is constructed of the same material as thatemployed forthe shell 55'and has connected to its inner face the bulls-eye or reflector 63. The top 58 for closing the dome or chimney carries a suitable ornament, which as shown is the eagle 64. The front wall 59 is retained Win position by means of the keeper 65, con- ..nected to the sidewalls, and a pair of brackets 66, which extend in a vertical manner and are suitably connected at their lower endsto the top of the shell 55.

t is substantially cylindrical in contour and has connected to'the front thereof a glass globe 67 by means of the spring-catches 68, one arranged atthe top and the other two at the sides ofthe shell. The inner face of the top The shell 55 of the shell at the front of the burner has suitably connected thereto an inclined reflector 69, and the inner face of the back of the shell is provided with a reflector 70. The rear portion of the shell is detachable, so that ingress can be had thereto to light the burner. The front of the shell 55 is cut away, as shown, for the purpose of directing the light to the sides and also to permit the reflector 6.2 to

focus the light. The heat caused by the flame will pass out of the lampthrough .the openings in the chimney or dome. The inclined ends of the burner 53 extend upwithin the dome, so that the flame will project therein and illuminate the ornamentation design upon the transparent front wall of the dome. In Fig. 4 a burner is shown which is of the construction as the burner 53, with the ex ception that the inclined ends 52 are dispensed with, making the burner shown in Fig. 4 substantially concentric in contour.

This burner is indicated by the reference character 71. Otherwise than that as noted the burner 71 is of the same construction as the burner 53.

The lower portion of the passage 45, below the connecting member 46, is adapted to have placed therein cotton-batting or other suitable material, which forms a purifier for the gas as it passesfrom the gas-generating chamber 15 to the pipes 50. The cotton-batting or other material is adapted to strain or filter the gas. This material is indicated by the reference character 72.

It is thought the manner of generating the gas can be thoroughly understood, as it isobvious that when the water is fed to the gasgenerating and carbid chamber 15 and when it comes in contact with the carbid the gas will be given off and passed from the chamber 15 through the port 25, port 44, through the cotton-batting 72, through the passages 47 into the pipes 50, and thence into the burner, where it is ignited when occasion requires. The passage of water to the gasgenerating and carbid chamber 15 is controlled by the plug 18 and it will be evident that when the port 18 does not register with the port 18 the generation of gas will be stopped, owing to the fact that no water can pass from the water-reservoir to the gas-generating and carbid chamber 15. The various portions of the lamp are preferably constructed of aluminium to insure lightness with the exception of the shell 55, which is constructed of sheet metal, although, if desired, the shell 55 may be constructed of aluminium; but any suitable metal may be employed for the various parts.

It is thought the many advantages of a gaslamp for bandsmen, miners, and campaign marching-clubs and for other purposes for which it is applicable constructed in accordcan be readily understood, and itwill also be evidentthat I have devised a simple, inexance with the foregoing description, taken in i connection with the accompanying drawings,

pensive, and novel form of gas-lamp for the purposes set forth, and it will furthermore be evident that changes, variations, and modifications may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages, and I therefore do not wish to restrict myself to the details of construction hereinbefore described, and as shown in the accompanying drawings, but reserve the right to make such changes, variations, and modifications as come properly within the scope of the protection prayed.

Having thus'fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A lamp of the characterdescribed, comprising a casing forming a water-reservoir, a receptacle forming a gas-generating and carbid chamber communicating with said waterreservoir, a plug carried by the bottom of said receptacle and adapted to regulate the flow of water from said reservoir to said gas-generating and carbid chamber, a spring-pressed perforated plate arranged in said receptacle, a safety-valve mechanism carried by said receptacle, a burner, gas-supply pipes communicating with and supporting said burner, and means for establishing communication between said gas-generatin g and carbid chamber and the said supply-pipes.

2. Aburnersubstantiallyconcentricincontour and havingits inner side and its ends provided with jet-openings, and gas-supply pipes communicating with said burner and connected thereto for supporting it.

3. Alamp comprisinga housing,a dome carried thereby having a transparent front wall provided with an ornamentation, gas-supply pipes extending in said housing, and a burner arranged in the housing and extending in the dome.

4. Alamp comprising a housing, a reflector connected to the inner face of the rear wall thereof, a reflector connected to the inner face of the top of said housing, a globe connected to the front of said housing, a dome carried by the said housing and having a,

transparent front wall provided with an ornamentation, a reflector connected to the inner face of the rear wall of said do me, a burner arranged in said housing and extending in said dome, and gas-supply pipes communicating with said burner and adapted to suspend the same within the housing.

5. Alamp comprising a housing, a globe detachably connected to the front thereof, an inclined reflector secured to the inner face of the top of said housing, a reflector secured to the inner face of the rear of said housing, a burner suspended within said housing between the said refiectors, means for supporting the said burner and adapted to supply gas thereto, and a gas-generating means communicating with said supporting means.

6. A lamp of the character described comprising a receptacle forming a gas-generating and carbid-holding chamber, an apertured nipple arranged within said chamber, a perforated plate adapted to be mounted upon the carbid within the said chamber, a spring arranged in the said chamber and adapted to keep the said plate in contact with the carbid, a safetyvalve mechanism carried by said receptacle, a casing forming a waterreservoir adapted to communicate with the said chamber, means for establishing communication between the said chamber and reservoir, and a burner communicating with said means.

7. In a lamp of the character described, a gas-generating means, a housing, a burner suspended in said housing, gas-supply pipes communicating with said burner and adapted to suspend the same within the housing, a coupling member communicating with the said chamber, and a connecting member attached to said coupling member and said pipes and adapted to establish communication between the pipes and said coupling member.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES JOHNSON. 

